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Lifetime growth and carcass composition of heifers and steers non-implanted or sequentially implanted with anabolic agents

  • M. G. Keane (a1) and M. J. Drennan (a1)

Abstract

Sixty-four (48 female and 16 male) spring-born Hereford × Friesian calves were used to examine the effects of sex type, heifer slaughter age and implantation with anabolic agents on growth and carcass composition. Non-implanted and implanted heifers were slaughtered after 491, 612 and 731 days and non-implanted and implanted steers (castrated on day 81) were slaughtered after 731 days. Implantation was with 36 mg resorcylic acid lactone (RAL) on days 81 and 171 and RAL plus 300 mg trenbolone acetate on days 395, 491, 583 and 658.

Carcass weights of non-implanted and implanted heifers slaughtered at 491, 612 and 731 days were 189 and 206, 218 and 235 and 290 and 326 (s.e.d. 10·1) kg respectively. Carcass lean, bone and fat weights and fat proportion increased with increasing slaughter age but proportions of lean and bone decreased.

There was no difference between heifers and steers in growth rate to 395 days but from 395 to 731 days the steers grew faster than the heifers. Non-implanted and implanted steer carcass weights at 731 days were 297 and 355 (s.e.d. 9·5) kg respectively. Steer carcasses had higher lean and bone proportions and a lower fat proportion than heifer carcasses. Implanted animals had heavier carcasses than non-implanted animals and all of the extra carcass weight consisted of lean and bone. The results indicate that non-implanted and implanted heifers and steers had similar lean proportions when the heifers were 31 and 70 kg carcass weight respectively lighter than the steers.

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References

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Agricultural Research Council. 1980. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux. Slough.
Berg, R. T., Andersen, B. B. and Liboriussen, T. 1978. Growth of bovine tissues. 2. Genetic influences on muscle growth and distribution in young bulls. Animal Production 27: 5161.
Berg, R. T., Jones, S. D. M., Price, M. A., Fukuhara, R., Butterreld, R. M. and Hardin, R. T. 1979. Patterns of carcass fat deposition in heifers, steers and bulls. Canadian Journal of Animal Science 59: 359366.
Drennan, M. J. 1971. Single-suckled beef production. 2. Influence of stocking rate during the grazing season, creep grazing of the calf and double-suckling on calf performance. Irish Journal of Agricultural Research 10: 297305.
Drennan, M. J. and Keane, M. G. 1986. Performance of implanted and unimplanted fattening steers fed different levels of concentrates with silage. Irish Grassland and Animal Production Association 12th Annual Research Meeting. pp. 1011.
Drennan, M. J., Rochk, J. F. and L'Estrange, J. L. 1981. Effect of monensin sodium, resorcylic acid lactone and trenbolone acetate on performance and feed intake of finishing cattle. Irish Journal of Agricultural Research 20: 113123.
Fisher, A. V., Wood, J. D. and Whelehan, O. P. 1986. The effects of a combined androgenic — oestrogenic anabolic agent in steers and bulls. 1. Growth and carcass composition. Animal Production 42: 203211.
Flynn, A. V. 1981. Systems of beef production from dairy herd calves. In Calf to Beef, Handbook Series No. 17, An Foras Taluntais, Dublin, pp. 13.
Flynn, A. V. 1985. Beef production from Friesian calves. Veterinary Update 1: 3436.
Fortin, A., Reid, J. T., Maiga, A. M., Sim, D. W. and Wellington, G. H. 1980a. Effect of energy intake level and influence of breed and sex on the physical composition of the carcass of cattle. Journal of Animal Science 51: 331339.
Fortin, A., Reid, J. T., Maiga, A. M., Sim, D. W. and Wellington, G. H. 1980b. Effect of level of energy intake and influence of breed and sex on muscle growth and distribution in the bovine carcass. Journal of Animal Science 51: 12881296.
Fredeen, H. T., Martin, A. H. and Weiss, G. M. 1971. Characteristics of youthful beef carcasses in relation to weight, age and sex. II. Carcass measurements and yield of retail product. Canadian Journal of Animal Science 51: 291304.
Fredeen, H. T., Weiss, G. M., Rahnefeld, G. W., Lawson, J. E. and Newman, J. A. 1982. Environmental and genetic effects on preweaning performance of calves from first-cross cows. II. Growth traits. Canadian Journal of Animal Science 62: 5167.
Galbraith, H. and Topps, J. H. 1981. Effect of hormones on the growth and body composition of animals. Nutrition Abstracts and Review Series B 51: 521540.
Griffiths, T. W. 1982. Effects of trenbolone acetate and resorcylic acid lactone on protein metabolism and growth in steers. Animal Production 34: 309314.
Harte, F. J., Curran, S. and Vial, V. E. 1965. The production of beef from young bulls. 1. Irish Journal of Agricultural Research 4: 189204.
Haycock, R. E. and Stewart, D. A. 1973. A comparison of the Charolais, British Friesian and Hereford breeds as sires of crossbred single-suckled calves for beef production. Animal Production 17: 267273.
Hedrick, H. B., Thompson, G. B. and Kraiise, G. F. 1969. Comparison of feedlot performance and carcass characteristics of half-sib bulls, steers and heifers. Journal of Animal Science 29: 687694.
Jones, S. D. M., Price, M. A. and Berg, R. T. 1980. The growth and distribution of muscle in bulls and heifers of two breeds. Canadian Journal of Animal Science 60: 669675.
Keane, M. G. 1984. Use of implants for beef cattle. Journal of Irish Grassland and Animal Production Association 18: 4452.
Keane, M. G. 1985. Use of anabolic agents in beef cattle during the grazing season. Irish Veterinary News, April, pp. 1117.
Keane, M. G., Drennan, M. J. and Sherington, J. 1986a. Effects of nutrition and anabolic agents in the growing and finishing phases on growth rate and carcass weight of Friesian steers. Irish Journal of Agricultural Research 25: 1121.
Keane, M. G., Flynn, A. V. and Harte, F. J. 1986b. Responses to sequential use of different anabolic agents in young bull, young steer and two-year-old steer beef systems. Irish Journal of Agricultural Research 25: 153166.
Keane, M. G. and Sherington, J. 1985a. Response in growing and finishing steers to long- and short-acting anabolic agents. Irish Journal of Agricultural Research 24: 110.
Keane, M. G. and Sherington, J. 1985b. Effects of frequency of implantation and type of anabolic agent on performance and carcass traits of finishing steers. Irish Journal of Agricultural Research 24: 161169.
McNally, D. H. 1970. A note on the weights and weight gains of some Charolais and contemporary-calves of other breeds in Northern Ireland. Animal Production 12: 539542.
Mukhoty, H. and Berg, R. T. 1973. Influence of breed and sex on muscle weight distribution of cattle. Journal of Agricultural Science, Cambridge 81: 317326.
Nicoll, G. B. 1982. Effects of double suckling at pasture. 2. Calf performance. Animal Production 35: 395400.
Rahnefei, D. G. W., Fredeen, H. T., Weiss, G. M., Lawson, J. E. and Newman, J. A. 1983. Sex and year effects on carcass characteristics of three-way cross beef cattle reared at two locations. Canadian Journal of Animal Science 63: 285298.
Riokdan, E. B. and Mellon, K. 1978. Beef carcass classification as an aid to prediction of carcass value. Irish Journal of Agricultural Economics and Rural Sociology 7: 932.
Riordan, E. B., Schwer, S. J. and Godson, C. 1978. Beef Cuts Code: Specifications for Cutting and Trimming of Beef. An Foras Taluntais, Dublin.
Roche, J. F. 1980. The use of growth promoters in beef cattle. In The Use, Residues and Toxicology of Growth Promoters, pp. 112. An Foras Taluntais, Dublin.

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Lifetime growth and carcass composition of heifers and steers non-implanted or sequentially implanted with anabolic agents

  • M. G. Keane (a1) and M. J. Drennan (a1)

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